"Deport them," Arpaio said when asked about undocumented immigrants who were brought to the U.S. as children.

The future of so-called Dreamers, who were allowed to stay and work in the U.S. without fear of deportation under the Obama-era Deferred Action of Childhood Arrivals order, after President Trump rescinded the program.

It expires in March.

"When we come across these kids, or some are older than just kids," Arpaio said, "Then deport them. You deport them back to the country they came from."

Arpaio, a polarizing figure who gained notoriety for racially profiling Latinos, contradicted his own words from a day earlier.

On Wednesday, he said that he would back the President if Trump supported a bill to keep Dreamers in the country.

"Well, first of all, if I was a senator now and the President really wanted this, I probably would back him up on it because I really do respect his judgment," Arpaio told CNN's Kyung Lah. "I have a lot issues where I support the President."

Activists rally for the passage of a "clean" Dream Act on Jan. 10, 2018 in New York City. (Drew Angerer/Getty Images)

Trump has said that he wants a "bill of love" that would allow the 800,000 Dreamers in the U.S. to stay, as long as legislation includes funding for a wall along the border with Mexico.

Arpaio served as sheriff of Maricopa county in Arizona for 24 years before he was voted out of office in 2016.

He was pardoned by Trump last August after a federal judge found him in contempt of court after his office refused to stop detaining people suspected of being undocumented.

The pair were both vocal proponents of the "Birther Movement," which promoted the false idea that President Barack Obama was not a U.S. citizen.

Arpaio stubbornly stood by his discredited belief on Wednesday.

"I'm not gonna back down on this. I don't care if I lose elections or anything," he said during a sitdown with WABC Radio's Rita Cosby and Curtis Sliwa. "I'm going to tell you again that that document is a forgery."

Arpaio announced on Tuesday that he is running for to replace Sen. Jeff Flake, who announced he is retiring at the end of his current term.